Double faced eleoteic clock



2 Sheets-Sheet 1.

' (No Mdem E. W. LINDENAU. DOUBLE PAGLD ELECTRIC CLOCK.

No. 424,929. Patented Apr. l, 1890.

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N0. 424,929. Patented Apr. 1, 1890.v

UNITED STATES PATENT OFFICE.

ERICK WILI'I. LINDENAU, OF JOLIET, ILLINOIS, ASSIGNOR TO rl`IfIE JOLIET CLOCK MANUFACTURING COMPANY, OF SAME PLACE.

DOUBLE-FACED ELECTRIC CLOCK.

SPECIFICATION forming part of Letters Patent No. 424,929, dated April 1, 1890.

Application filed November 2, 1889. Serial No, 329,068. (No model.)

To all whom t may concern:

Be it known that I, ERICE WILH. LINDENAU, a citizen of the United States of America, residing at Joliet, in the county of Vill and State of Illinois, have invented certain new and useful Improvements in Electric Clocks, of which the following is a specification, reference being had therein to the accompanying drawings, and the letters of reference thereon, forming a part of this specification, in which- Figure l is a side elevation of the clock. Fig. 2 is a vertical central section of the clockcase on a reduced scale from Fig. l; and Fig. 3 is a horizontal sectien`on line l of Fig. l, looking down, part of the frame being broken away to show parts below it.

The invention relates to certain improvements in electric sign-clocks for keeping time, of the class designed to be operated by an electric current produced by an ordinary battery connected with electro-magnets in the ordinary manner, and designed to operate the oscillating armature of the clock, as the electric circuit is opened and closed, by some instrument or means in the electric circuit.

Any ordinary circuit-breaker may be used to open and close the circuit, and hence no special circuit-breaker will be described, as the circuit-breaker 'forms no part of this invention.

Referring to the drawings,A B CD F illustrate a suitable frame on which the several operating parts have their bearings.

L is a horiZontally-arranged ratchet-wheel having the integral pinion. Z on its upper side and boxed on a vertical stud set in frame C.

K is the oscillating armature, made of suitable metal for that purpose, secured on the vertical shaft S2, which is stepped in frame I) at its lower end, and boxed in frame C at its upper end in such manner that said armature may oscillate within the limits permitted by the banking-screws 7L h and over the electromagnets, but in such manner as not te be 'in contact with them.

Il is a pawl pivotally attached at its heel to one end of armature K in su. ch manner that its free end may enga-ge the teeth et said.

ratchetwheel, and by which said ratchetwheel is intermittently driven one notch at a time as the armature oscillates. V is a coilspring connecting said pawl with frame C on its under side, which is for the purpose of holding said pawl engaged with said ratchetwheel and for oscillating backward the armature when the electric circuit is broken and the armature is free to return to its first positien.

II is a detcnt-pawl having its heel pivotally studded to the under side et frame C, and having its free end engaged with said ratchet and held engaged therewith by means of spring' d, attached to its stud, and is for the purpose of preventing said ratchet from turn ing backward.

O is a horizontally-arranged gear -wheel, fixed upon the vertical shaft SS, stepped in frame C at its lower end and boxed in traine B at its upper end. Said gear-wheel O meshes with pinion .Z of ratchet L and is driven thereby. Said shaft S3 is provided near its upper end with the worm XV, which meshes with a worm-wheel f2', arrangedon the inner end of the minute-post S. The said wormwheel is frictionally secured on the minutepost S in suoli manner that the said post may be turned in either direction independently of said worm-wheel for the purpose of setting the clock to show the proper time.

a is a cannon-pinion lixed on post S, and drives the hour-wheel C through the medium et the n'iinute-wheel e and its integral pinion g, studded to frame F.

The minute-post S, hour-wheel C, cannonpinion a, minute-wheel c, and pinion g are duplicated by those shown, respectively, atS, c, d', c', and g', for the purpose of providing the clock with duplicate hands and dials, so as to show two faces arranged opposite each other.

The minute-posts S and Sf are connected. through the medium of the bevel-gears o' and fr?, iiXed, respectively, en said pests, and the intermediate bevel-gear fr', studded on frame F, so that said worin and worm-wheel drives each duplicate movement at the same speed. Only one side is shown as being provided with hands, but hands are of course intended IOO to be placed on each minute-post and hourwheel.

T represents a section of a dial, one of which it is intended to place in front of each movement.

J and J are duplicate second-hand posts, respectively provided on their inner ends with the pinions P and P', which mesh with the pinion Z of ratchet-wheel L and are driven thereby.

E E are a pair of ordinary electro-1nagnets, arranged, respectively, one under each extending end of armature K. These electromagnets have their coils connected in the ordinary manner with a battery. (Not necessary to be shown.)

It is intended to introduce somewherein the line an ordinary weight-clock for the purpose of opening and closing the eircuitof the electric current, for the purpose of giving the impulses to the armature; but, however, as hereinbefore stated, any kind of a circuit-breaker may be used in any way desired to accomplish the purpose.

P3 is a post for connecting and securing together the two parts C and D of the frame.

This clock is intended tobe inclosed in a double-faced case and to be used in places Where it would be necessary to show a face in two directions.

N is a pin set in frame C, immediately forward of pawl H, as shown in Fig. 2, for arresting the forward movement of the pawl beyond the lilnit intended.

In consequence of the clock being for use as a sign-clock te hang ont of doors, it is necessary that the case should be constructed to be impervious to the weather, dampness,

rain, the. In order to so construct the ease, an annular packing V is introduced between the case N and the bezel D2; also, a suitable packing-ring m is introduced between the two parts of the case N N. The crystals D are designed to be cemented into the flanges of the bezel in such manner as to be water-tight. By this construction no rain or dust can enter the ease to injure the eloel: mechanism.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is as follows, to wit:

l. In combination with the frame and the electro-magnets E E, the armature. K, pawl H, spring V, detent-pawl I-I, spring CZ, ratchetwheel L, having the pinions Z, second-l1and posts J J, having pinions lD P gear-wheel O, shaft S3, having worin \V,wor1n-wheel i, minute-posts S S', minute-wheels C C, cannonpinions a a', minutc-wheels e e', having pinions g g', and the bevel-gears rr r2, substantially as and for the purpose set forth.

2. In the electric clock shown and described, and in combination with the electro-magnets E E, the armature K, arranged to oscillate above but not to be in contact with said niagnets, pawl II, connected to one end of said armature, coil-spring V, for returning said pawl and said armature, spring-detent pawl H', ratchet-wheel Ii, having pinion Z, pinion O, shaft S3, having worin IV, and worm-wheel i, substantially as and for the purpose set forth.

ERIGK VILH. LINDEN/XU.'

lVtnesses:

Trios. Il. HUTCHINS, W. A. GUs'rArsoN. 

